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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id o6sm9945160qkk.53.2020.01.27.10.17.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 27 Jan 2020 10:17:19 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH] mm: mempolicy: use VM_BUG_ON_VMA in queue_pages_test_walk() Date: Mon, 27 Jan 2020 13:17:18 -0500 Message-Id: <1221B3C6-6A3B-4427-92DD-25AD54FF6BB5@lca.pw> References: <1579068565-110432-1-git-send-email-yang.shi@linux.alibaba.com> Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <1579068565-110432-1-git-send-email-yang.shi@linux.alibaba.com> To: Yang Shi X-Mailer: iPhone Mail (17C54) X-Bogosity: Ham, tests=bogofilter, spamicity=0.144666, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Jan 15, 2020, at 1:09 AM, Yang Shi wrote: >=20 > The VM_BUG_ON() is already used by queue_pages_test_walk(), it sounds > better to dump more debug information by using VM_BUG_ON_VMA() to help > debugging. What=E2=80=99s the problem this is trying to resolve? Was there an existing b= ug would trigger this?=